Kristin Ward, performance management and quality improvement specialist at Cambridge’s Public Health Department, answered questions ob how the department works with Cambridge Public Schools administrators to respond to Covid-19 issues.

The first yellow school buses reappeared on Cambridge streets last week, and an initial glimpse into the reopening of the public schools was provided at the School Committee meeting on Tuesday.

All public school staff working in-person will be provided with free Covid-19 testing twice a week and see a range of other safety measures, the Cambridge Public Schools and Cambridge Public Health Department said Friday.

All grades will be fully remote in reopened Cambridge Public Schools until Oct. 13, superintendent Kenneth Salim said Wednesday. “We can’t meet the requirements to keep people safe,” he said, according to people familiar with the conversation.

The Cambridge Education Association sent an open letter signed with hundreds of names to the School Committee demanding that the academic year begin with remote-only classes.

The School Committee voted Thursday on a model to reopen schools after two meetings that ran more than six hours each, peppered with passionate public comment, detailed presentations on protocols and learning methods, extensive questions from committee members and expert input.

The sheer amount of complicated information and the concerns of stakeholders made it impossible to vote yet on a model to reopen schools in the fall, many School Committee members said, although they are supposed to vote early in the coming week.

Federal district Judge Allison D. Burroughs announced an agreement between the federal government and Harvard University and the Massachusetts Institute of Technology that would remove the need for an emergency court order over international students’ visas.

Immigration and Customs Enforcement responded Monday to a lawsuit brought by Harvard and the Massachusetts Institute of Technology seeking an emergency court order to let international students stay in the country while taking online-only classes.

The federal government has refused to delay barring international students from the United States if all their classes are online, and a judge has declined to enter a temporary hold on the policy requested by Harvard and the Massachusetts Institute of Technology.